Show BoxNow Locker ID

add_filter( 'manage_edit-shop_order_columns', 'register_dostava_vrsta_column', 10, 1 );
function register_dostava_vrsta_column( $columns ) {
    $columns['dostava_vrsta'] = 'Dostava';
    return $columns;
}

add_action( 'manage_shop_order_posts_custom_column', 'display_dostava_vrsta_column', 10, 1 );
function display_dostava_vrsta_column( $column ) {
    global $post;

    if ( 'dostava_vrsta' === $column ) {

        $order = wc_get_order($post->ID );
        $shipping =  $order->get_shipping_method();
        $boxid = get_post_meta( $post->ID, '_boxnow_locker_id', true );

        echo $shipping . ' ' . $boxid;
    }
}